Single-roll crusher



' Dec. 2, 1930. G. w. BORTON SINGLE ROLL CRUSHER Filed May 9, 1924 Patented Dec. 2, 1930 UNITED STA 'ras PATENT OFFICE GEORGE BURTON, OF' PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO PENNSYL- VANIA CRUS HER COMPANY. OF NEW YORK, N. Y., A CORPORATION OF NEW YORK SINGLE-ROLL CRUSHEB Application filed May 9, 1924. Serial No. 711,949.

My invention relates to that type of machine known as a singlerroll crusher designed and employed for the purpose of reducing mineral bodies to convenient size; more particularly employed for the purpose of breaking up large lumps of coal, ore and the like, and it consists of certain improvements in the construction of the anvil or breaker-plate employed with Crushers of this type.

In the present practice, single-roll crushers are of moderate size and the breaker-plate employed with the crusher roll is of the same length as the roll; both members being of massive construction. The breaker-plate is usually mounted to permit relief movement to avoid breakage when foreign objects, such as large pieces of wood, tramp iron, and the like, accompanying the coal and which are non-crushable, are delivered to the crushing point, anda usual practice is to back up or support each end of the breaker-plate with a coiled spring tending to move the same toward the crusher roll, and to provide one or more tension bolts -to act against the pressure of the springs and hold the breakerplate in proper operative position with respect to the crusher roll.

As may bewell understood, the presence of a large foreign body, incapable of being crushed, between the breaker-plate and the crusher roll requires that it be removed or discharged and if its size permits it to be discharged this can only be effected by the roll acting upon such foreign body against the breaker-plate and causing the latter to be pressed away from the roll against the ten I sion of the spring or springs serving to hold the breaker-plate in operative position. Should such foreign body engage the breakerplate at either end of the same, the resistance to be overcome cannot be equalized and due to the great leverage that would be exerted from one end of the plate there is great danger of the breaker-plate being cracked or broken;

a condition that would require stoppage of the crusher and dismantling of the machine until a new plate could be supplied.

One object of my invention is to reduce the possibility of' such breakage to a minimum,

particularly with long single-roll orushers,

where the leverage effected by a foreign nonerushable body engaging the breaker-plate at one end of the same would be enormous.

A further object of my invention is to reduce the extent of the widened gap between the preakenplate and the crusher roll when a foreign body is caught between these two parts, with consequent saving in the amount of oversize material passing between the breaker-plate and the crusher-roll, and a still further object of my invention is to facilitate repairs in the case of breakage,

To this end I propose to make the breakerplate in a plurality of sections hung from a common shaft, each of which sections will be independently supported and positioned in alignment with respect to the crusher-roll, in substantially the same manner as the continuous breaker-plate of the type now in common use is supported'and positioned; each section of my improved construction being provided with a spring and a tension bolt.

As the central portion of the breaker plate structure is subjected to the greatest amount of wear. a furtherandvaluable feature of my improved construction lies in the fact that when such wear occurs, the sections'of the breaker-plate can be resetto place a less worn section at the point of greatest wear. The tips of the breaker-plate sections are renewable when worn, and in some instances the tips only of the sections may be interchanged.

These and other features of my invention aremore fully described hereinafter; reference being had to the accompanying drawings, inwhich: 1

Figure 1, is asectional elevation of a singleroll crusher of the type to which my present improvements have been applied, taken on the line I-I, Fig. 2.

Fig. 2, is a sectional elevation on the line 11-11, Fig. 1, looking in the direction of the arrow a, and showing a front elevation of the breaker-plate sections.

Fig. 3, is a perspective View of one of my improved breaker-plate sections, and,

Figs. 4 and 5, arediagrammatic views illustrating a detail of my invention.

In the Fi 1, of the drawings, 1 repre sents the 100' y or casing of one form of single-roll crusher structure to which my invention may be applied, having the usual open hopper or chamber 2 receiving the material to be crushed and within which chamber a crusher-roll, generally indicated at 3, is disposed. This crusher-roll may be of the type described and claimed in U. S. Letters Patent No. 1,410,546, dated Mar. 28, 1922, which is shown for illustrative purposes only, since it will be understood that I do not wish to be limited to any particular form or character of crusher-roll that will be employed with my present improvements, which relate to the anvil or breaker-plate cooperating with the crusher-roll.

In the present practice a single breakerplate is pivotally hung from a cross shaft;

eing maintained in proper operative position with respect to the crusher-roll movably mounted in the throat of the hopper by means of a tension bolt (or bolts) anchored to the frame, and holding such breaker-plate against the pressure exerted by a plurality of springs adjustably mounted with respect to the frame. Secured to such breaker-plate and extendin across the face of the same, the full leng h of the crusher-roll, is a socalled breaker-plate tip usually of massive construction; preferably of manganese steel or other hard, wear resisting metal, and the final crushing of the coal, ore or other mineral body being reduced by the operation of the crusher-roll takes place between the same and this crusher plate tip. In the present practice, this breaker-plate tip is a single member suitably secured to the breaker-plate by bolts or other fastening means, and it is usually corrugated longitudinally of the roll.

In carrying out my present invention, I propose to make the breaker-plate in a plurality of sections, each section being mounted independently of another, and to provide each breaker-plate section with a tip of the same width as the section to which it is secured; the several breaker-plate sections having a common support, being normally maintained in unit alignment, and disposed in the same relative position with respect to the crusher-roll as a single breaker-plate.

In Figs. 1 and 2, I have illustrated one arrangement within the scope of my invent1on in which the breaker-plate sections are indicated at 10, carried by a shaft 11, upon WhlCll they may rock; the said shaft being adapted to bearings 12, in the side plates 13 of the crusher frame, and held against longitudinal movement by cotter pins 14, or other suitable means permitting ready dismantling and removal for the renewal or replacement of breaker-plate sections when necessary.

The sections making up my improved breaker-plate structure are of massive construction, and each of the same may comprise a front web or wall 20, with side walls or flanges 21, connected by a top flange 22. These sections are hung from the shaft 11, and for this pur ose each section may be provided with hu s 23, extending inwardly from each side wall or flange 21. In addition, the rear face of the wall 20 carries an apertured lug 24, to which the yoked end of a tension bolt 25, may be secured by a suitable pin 26. At the lower ends of the sections, the front wall or web is recessed or rabbeted at 27 for the reception of a breakerplate tip 28, of manganese steel or other suitable wear-resisting metal. This plate may be corrugated as shown in the drawings, and held to the plate section by bolts 29,

whose heads are adapted to recesses formed in said tips. Additionally, the end of the sections may be recessed as indicated at 30,

to receive ribs 31, formed on the rear surface of said tips, and the securing bolts 29 pass through these ribs. The rear of each breaker- )la-te section may be provided with a boss 32 orming a seat for a spring 33.

The several breaker-plate sections are arranged for joint cooperation with the crush er-roll, and each section is normally maintained in the position indicated at Fig. 1 by the coiled spring 33, which tends to push such section toward the crusher-roll, while the tension bolt 25 connected to the section by the pin 26 is designed to restrain the pressure of the spring. The bolt 25 may be anchored to the frame b means of suitable nuts 35, 35, disposed be ind a channel bar 36, extending across the end of the crusher frame and properly secured to the same. The spring is disposed between a boss 32 on the breaker-plate section and a rocking seat 37 operatively supported by a pair of supporting blocks 38 and 39, which may be secured to a channel bar 40, by a bolt 41 and nuts 42, and to provide for adjustment between the parts so that the spring, in any position that the breaker-plate may assume, is under no greater tension, a plurality of U-shaped shims 43 may be disposed between the blocks 38 and 39; the slotting of these shims permitting ready introduction and removal by simply loosening the bolt 41 holding the supporting blocks in place.

In Figs. 4 and 5, I have indicated. diagrammatically the manner in which the worn breaker plate sections may be interchanged, relatively to each other, when it is desired to shift the worn sections. In Fig. 4, I have shown the manner of shifting the three sections with respect to each other, and in Fig. 5, I have shown the manner of shifting two sections. By this means I am able to secure increased wear for said breaker plate sections.

I claim:

1. The combination in a single roll crusher having an open hopper and an unobstructed delivery space and a toothed crushing-roll rotatably mounted in the throat of the hopper, of a breaker plate cooperating with said roll and disposed in relatively fixed position with respect thereto and out of contact therewith; said breaker plate comprising a plurality of interchangeable sections, a common support for each of said breaker plate sections, individually adjustable and yieldable supports for said breaker plate sections, common supporting means for said individually yielding supports, and tension means for each breaker plate section disposed above said yieldable supports.

2. In a structure such as set forth in claim 1, coiled springs constituting the individually adjustable and yieldable supports sustaining said breaker plate sections independently of each other and the tension means comprising bolts having yoked ends connected to the rear of each breaker plate section and disposed above said springs.

3. In a structure such as set forth in claim 1, detachable Wear members carried by the lower ends of said breaker plate sections in line with their individually yieldable suports.

p 4. In a single roll crusher, the combination of a frame having an open hopper, a toothed crushing-roll rotatably mounted in the throat of said hopper, a breaker-plate positioned in the hopper; said breaker-plate comprising a pluralit of substantially similar and interchangea le unit sections, a common pivotal mounting for said breaker-plate sections, individually yieldable means asso ciated With each breaker-plate section, a tension bolt connected to each breaker plate section above said yieldable means and a common support for said individually yieldable means.

In witness whereof'I have signed this specification.

GEORGE W. BORTON. 

